Sorry for not updating in the past few months. I've been busy working with Team Thursday Knights in San Diego on events and working on a few of my friends' 240sx's. I start school next month and should be living it easy until I get my Associate's Degree. Anyways, enough of my blibber blabber, here we go to some sick mods for you S13/S14 240sx!!!!
Final Drive: 4.636
There are different types of modifications to help you accelerate faster in your 240sx. Bolt-ons and power adders are a "No Brainer" in helping your car accelerate through more power being put down to the pavement. You can also slap on sticker tires and a properly tuned suspension set up will also help you put the power down more properly and help you attain more grip and traction.
A slightly more invovled means of accelerating faster deals with your driveline, notably the Transmission and Differential. Each shifting gear in your transmission has a set ratio and so does your Differential.
This mod is useful for anything that would require your 240sx to stay in the powerband and/or accelerate faster i.e. Drag Racing, Road Racing, Drifting, etc.
S13/S14 240sx Transmission Gear Ratios
1st- 3.321
2nd- 1.902
3rd- 1.308
4th- 1.000
5th- 0.759
S13/S14 240sx Differential Final Drive Gear Ratio
Final Drive- 4.083
The transmission gear ratios, in layman's terms, denotes how long or short you stay in that particular gear before you can no longer accelerate and you will have to shift in order to continue accelerating. 1st gear is relatively short, while you can hang in 5th gear for much longer accelerating.
The final drive ratio denotes how fast you can accelerate at the cost of top end speed. If the final drive number is lower it will raise your overall top speed, but you will accelerate slower through the gears. If you were originally topping out first gear at 20mph, if you installed a final drive that had a lower number for gearing, you would be able to top out much much higher than 20mph in first gear. If the final drive number is higher, you will lower your overall top speed, but you will be to accelerate faster through the gears.
You are able to swap out gears in the transmission to affect acceleration, but that is quite labor intensive, requiring a number of specific specialty tools and knowledge of disassembling and assembling transmissions.
A more effective, less time consuming, and cheaper way of affecting acceleration in this aspect is to swap out Differentials for ones with different Final Drive Ratios.
Here is a quick list of Nissan R200 Differentials and their Final Drive Ratios
S13/S14 240sx- 4.083
Z32 300zx TT- 3.692
R32 GTS-t- 4.36
R33 GTS25t- 4.363
Infiniti J30- 3.916
Nissan JDM Largo- 4.88 (certain editions)
Information that I have gathered for this post is from various sources including: www.zilvia.net, www.nicoclub.com and http://forums.freshalloy.com
Infamous 4.636 Final Drive Gear!
Cost of mod: $100~$200 for Xterra Front Diff depending on where you procure it from
Parts Needed:
-2001 Nissan Xterra Front Differential (4.636)
-Spare (S13/S14) 240sx R200 Differential
Procedure:
What you are doing is gutting the Nissan Xterra front differential for the Ring and Pinion Gear, then using said Ring and Pinion Gear to replace the ones from your 240sx R200 Differential. The Xterra Diff will not physically fit into your 240, but the ring and pinion will swap over.
Part Locater
1) Enter the following url into broswer: http://www.car-part.com
2) Enter the following into the drop down boxes-
*Select Year: 2001
*Select Make/Model: Nissan Xterra
*Select Part: Carrier (See Also Differential)
*Country: Which ever country you are looking for the part in
*Distance: Distance
*Enter Postal Zip Code: The zipcode that you wish to find the part closest to
3) A screen should come up prompting which Carrier you can choose. Choose the Front Carrier with the 4.636 gearing.
4) A screen will pop up with Dismantling and Junkyards in your area with the front differential.
TIP: If you are having the diff sent to you, make sure the yard verifies the final gearing ratio by cracking open the diff casing and looking on the pinion gear for the stamped ratio.
